unique

Do you mind explaining everything to me? I thought burning discs at lower speeds caused less errors, or at least that's what I've read before on websites. I'm glad I only bought two Sony DVDs. I already updated to the newest firmware when I had trouble burning the first DVD. My DVD burner says, "8X maximum by Zone CLV". What speed DVDs should I get, and do I just need to get some Verbatim or Taiyo Yuden discs and it should work?

Current problem is: 1. On my XP SP3 machine, I used Ultra ISO (newest version) to attempt to burn a Sony DVD+DL. 2. The Memorex DVD drive gave an error message stating, "Power calibration error". I looked it up, tried some things out, and came to the conclusion it was due to a dusty DVD drive. 3. I moved my .iso file to my Vista SP1 machine and tried to burn it a second time using our brand new DVD burner (LITEON iHAS 220-08-06). 4 The disc spent 45 minutes burning at 2.5. 5. When it finished, it failed the verification check, and no drives can read it. Vista prompts to format the disc when I try to open it. I don't want to waste any more of these expensive DVDs, so help me out please! What settings within ImgBurn or Vista do I need to change to make my discs burn correctly this time?